Pressure gauge



Nov. 27,1923. 1 1,47'51252 K. SWANJORD PRESSURE GAUGE:

Filed May l, 1920 INVENTOR.

` fcitizen of the catarata New. 2z, ieee. g

PRESSURE GAUGE.

Application led Hay 1,-

youll whom t ooncernr v v Be it known that' I, KNUTE SWANJORD, United States, residing at Balaton, in the county of Lyon and State of Minnesota, have invented certain new and useful Improvements. vin Pressure Gauges,

of which the following is'a specification.

- tires andhas as one of its to the ina'tion thereof,

' The invention has asa further object to provide'- a gauge employing a valve which may be operated to control the flow ofair through the delivery hose so that the iniiation of Vthetire may be readily controlled.

' A still further object of the invention is to provide agauge wherein the valve may,

without causing the gauge to register, be moved' to one position for inflation of the tire and may then be moved to another-posi# A tion cutting olf the air supply and simultaneously causing the gauge to register the 'air pressure in the -tire entirely uninliuenced by the pressure of the air supply.V

And the invention has as a still furtherl object `to provide a device which will bev accurate and dependable and which will be characterized by structural simplicity.

. Other and incidental objects will appear hereinafter. v

4o nary delivery ln the drawings: Y Figure 1 is a perspective view showing my improved air auge interposedin the ordiose of an air supply tank, the-hose being. illustrated as connected to the valve of a tire of a motor vehicle.

Figure 2 is a,4 vertical section taken medially through the device.

Figurey 3 is a perspective view showing Y' the gauge valve in detail,iand v Flgure 4 is a vertical section taken at sub g I stantlally right angles to Figure 2. to

ferrmg now more particularly to the drawing, it will be noted that Ihave shown my' `ilgnproved 'gauge in connection with thel ordinary delivery-hose 10 of an air supply tank, this hose being provided` at itswouter end'with a valvconnection 11 of convenhfonal typeu In 1 e athis valve cenae'e` -end t 1920. seria; 'No.avasza l" tion is, shown as engaged over the casing of the valve of one of the tires 12'of a in otor vehicle. As is usual, the connection 111s of sucl 1 ,construction'that when engaged with a tlre valve casing, said connection will serve to depress the stem of the valve for .I

holdin `the valve open, thus permitting a flow o air into the tire and, inthe present instance, a How o fair from the tire to the gauge.

In carrying the invention into effect, my

improved. gauge is formed with abody 13 provided at opposite sides thereof with reduced'alined extensions 14A at the outer ends of which are nipples 15. Through the body are alined horizontal passages 16 and 17 respectively7 opening through said nipplesf and, as will now beobserved,'the hose 10 is split freferably at a point adjacent the outer ereof, when the severed ends of the hose are fitted over the nipples 15 for thusj-'v operatively connecting the device with they.

hose. Preferably, clamping collars 18 are employed for securing the` hoseto' said nipples. Formed through the body medially thereof is a valvefchamber 19 lying vat substantially right angles to the passages 16 andA 17 which the chamberv intersects, and rotatably fitted through saidchamber is the plu of the control valve 20 employed. Exy ten ing from the outer end. of the valve plug is a lever or handle 21 and formed on the inner end of the plug is a `reduced threaded stud 22 over which is fitted a washer` 23 while a nut24: is threaded upon position of the valve, with the'J passages 16 vand 17 v and lying at substantially rightangles t0 the Passage 25 is a branch passage 26 in the plug,

Formed on the body 13 of the gauge medially thereof is `an upstandingV cylinder -27 upon the up er end of whichls threaded the stud for thus rotatably securingthe valve V I in place. Through the valve plug is formed a passage 25 adapted to register, Y1n one l a 96 a cap 28 and reely movable -through saidA s cap is a' plunger 29 which may be squaredto 'coact with the cap so as to beheld against rotation. lAt its inner end'the lunger 1s provided with a piston 30 slidagle within said cylinder. As .will be observed, the plungeris suitably calibrated and bearing between the piston and the cap is a hehca spring 31 surrounding the lunger'and norll .acting to hold the p unger retracted.

i .-f from the valve chamba? l@ @f gauge body through the bottom of the cylmder is a passage 32 and, as will now be observed, the valve may be moved to bring the branch passage 26 thereof into register with the passage 160i the 'valve body when the passage 25 of the plug will register at one end vwith Fthe passage 32. Formed through the valve plug isa vent passage' which, when the plug is turned to bring the passage 25 thereof into register with the .passages 16 and 17 of the -valve body, `will register at one end with the passage 32 and at its opposite end with a passage 34 in the ,valve body, the latter passage leading to the atmosphere.

As will now be readily understood in view of the preceding description, after the connection 11 of the hose 10 has been applied lto the casing of the tire valve, as shown in Figure 1, the handle 21 of the valve 2O of the gauge may be turned to horizontal position when air will be permitted to iow from the supply tank into the tire forl inlating the tire. Then, by swinging the handle of the valve in a direction opposite to its first movement, the air supply from the tank may be cutoff and coincidently, air from the tire may be let into the gauge cylinder when the plunger will, aswill be well understood, be projected for registering the air pressure in the tire. Should it then be desired to admit additional air to the tire, the handle may simply be returned to the first position indicated when, as will be noted, the air previously admitted to the cylinder 27 will be permitted to escape through the passages 33 and 34. Consequently, the plunger will be permitted to quickly return to its position ready for a new test. Accordingly,'by prop` erly rocking the valve leverback and forth air may be admitted to the tire, and the air pressure in the tire then tested as additional air is admitted thereto soythat the tire may be quickly and easily inflated as desired, it being particularly observed in this connection that when air pressure is admitted to the plunger cylinder of the gauge, the valve will completely cut olf the supply of air so that /the air pressure in the supply tank will not affect the accuracy of the gauge. It will accordingly be seen that I provide a particularly simple and eifective device for the purpose set forth and while I have shown and described this gauge -in connection with the delivery hose of an air supply tank, still I do not wish to be limitedin this regard since the gauge may, of course, be otherwise employed as, for instance, in connection with a hand pump. I accordingly reserve the right to all such adaptations of the invention as may fall within the spirit of the appended claim.

Having thus described the invention, what is claimed as new is:

A device of the class described comprising a valve casing, a seat formed in said casing, a valve body revolubly mounted in said seat and having three intercommunicating ports, a nozzle on said casing adapted to connect with a pressure source and'having a passage leading into said seat, a second nozzle adapted to connect with theepressure receiving element and a passage inl said second nozzle leading to said seat, said valve casing having a chamber in communication with said seat and said valve body having aL vent communicating with the atmosphere; said ports and vent being` so situated with relation to each other that iow of pressure fluid will take place through the passages from said first to said second nozzle, wlnle said chamber connects with the atmosphere through said vent, when the valve body stands in one KNUTE SWAN J ORD. [Ls] Witnesses:

vA. M. MOORE,

E. A, RoLLoFF. 

